Relation of Physical and Chemical Characteristics of Streams to Fish Communities in the Red River of the North Basin, Minnesota and North Dakota, 1993-95 PDF Download
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Author:
Publisher:
ISBN:
Category : Biotic communities
Languages : en
Pages : 72
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Book Description
Author:
Publisher:
ISBN:
Category : Biotic communities
Languages : en
Pages : 72
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Book Description
Author: Elizabeth A. Frick
Publisher: Geological Survey Water Resources Division
ISBN:
Category : Science
Languages : en
Pages : 320
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 352
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Book Description
Author: Jeffrey D. Stoner
Publisher: Geological Survey Water Resources Division
ISBN: 9780607891171
Category : Science
Languages : en
Pages : 40
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Author:
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 244
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Book Description
Author: Allison R. Brigham
Publisher:
ISBN:
Category : Freshwaster invertebrates
Languages : en
Pages : 58
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Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 840
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Book Description
Author: Michael D. Bilger
Publisher:
ISBN:
Category : Fish communities
Languages : en
Pages : 48
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Author:
Publisher:
ISBN:
Category : Stream ecology
Languages : en
Pages : 82
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Book Description
Stream habitat is characterized in the U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program as part of an integrated physical, chemical, and biological assessment of the Nation's water quality. The goal of stream habitat characterization is to relate habitat to other physical, chemical, and biological factors that describe water-quality conditions. To accomplish this goal, environmental settings are described at sites selected for water-quality assessment. In addition, spatial and temporal patterns in habitat are examined at local, regional, and national scales. This habitat protocol contains updated methods for evaluating habitat in NAWQA Study Units. Revisions are based on lessons learned after 6 years of applying the original NAWQA habitat protocol to NAWQA Study Unit ecological surveys. Similar to the original protocol, these revised methods for evaluating stream habitat are based on a spatially hierarchical framework that incorporates habitat data at basin, segment, reach, and microhabitat scales. This framework provides a basis for national consistency in collection techniques while allowing flexibility in habitat assessment within individual Study Units. Procedures are described for collecting habitat data at basin and segment scales; these procedures include use of geographic information system data bases, topographic maps, and aerial photographs. Data collected at the reach scale include channel, bank, and riparian characteristics.
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Category : Fisheries
Languages : en
Pages : 1222
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